fix: suppress dead_code warnings for unused provider and lane completion items

rust/crates/tools/src/lane_completion.rs

@@ -19,6 +19,7 @@ use crate::AgentOutput;
 /// 
 /// Returns `Some(LaneContext)` with `completed = true` if all conditions met,
 /// `None` if lane should remain active.
+#[allow(dead_code)]
 pub(crate) fn detect_lane_completion(
     output: &AgentOutput,
     test_green: bool,
@@ -65,6 +66,7 @@ pub(crate) fn detect_lane_completion(
 }
 
 /// Evaluates policy actions for a completed lane.
+#[allow(dead_code)]
 pub(crate) fn evaluate_completed_lane(
     context: &LaneContext,
 ) -> Vec<PolicyAction> {